I usually have lunch at twelve变为否定句

问题描述:

I usually have lunch at twelve变为否定句
don't应放在have还是usually前

我通常不在十二点前吃午饭.
I don`t usually have lunch at twelve .
I don`t have lunch at twelve usually.
Usually,I don`t have lunch at twelve.
这三种都可以,供参考